Overview and Purpose

The NPMC-8E1/T1/J1 is a telecommunications interface board in PMC (PCI mezzanine card) form factor. The module provides a highly scalable solution to telecom applications with the requirement of cost-effective E1/T1/J1 access.

Equipped with an onboard H.110/SCbus controller and eight primary rate E1, T1 or J1 interfaces the NPMC-8E1/T1/J1 provides an ideal and efficient interface for use with VME, PCI, CompactPCI and proprietary platforms.


The NPMC-8E1/T1/J1 is a P1386.1/ Draft 2.0 compatible PMC module, that can be plugged onto any VME, cPCI or other carrier board offering a PMC extension slot.The NPMC-8E1/T1/J1 is equipped with a PCI-to-local-bus bridge as the PCI interface. The local bus is directly connected to the onboard devices.The NPMC-8E1/T1/J1 is PCI Rev. 2.2 compatible (32bit).

Line Interfaces

The eight primary rate line interfaces, available by standard RJ45 connectors on the front panel, are implemented using the octal E1/T1/J1 framer 82P2288 from IDT.

All line interfaces can be individually configured to work as user or network side interface. Additionally all framing parameters, i.e. line codes etc., are settable via the PCI bus.

Backplane TDM Access

The onboard H.110 bus controller offers access to the backplane TDM bus supporting the full H.110 bus (PTMC) or the SC Bus subset on the PMC multi-purpose I/O connectors. It is implemented using an Altera FPGA and connects the backplane TDM bus with the internal TDM interfaces of the octal framer. Thus switching of timeslots between the different line interfaces as well as the TDM backplane is possible up to the full capacity of 4096 timeslots of the H.110 bus.

Key features
Technical details
Block diagram
Order code
Relating the key features of the NPMC-8E1/T1/J1 please consider the product description above!
PCI Interface and Compliance
  • PCI Rev. 2.2, 33MHz/32bit

H.110 Bus (and subsets thereof)

  • H.110 (PTMC) and SCSA subset

Line Interfaces

  • Four RJ45 connectors, implementing the 8 E1/T1/J1 line interfaces

Indicator LEDs

  • 4 software programmable LEDs at the front panel

Operating System Support

  • OK-1, VxWorks, LINUX

Power Consumption

  • 3.3V 0.8A , 5V 0.1A


  • Temperature (operating): 0ºC to +60ºC with forced air cooling,
  • Temperature (storage): -40ºC to +85ºC
  • Relative Humidity: 10% to 90% at +55ºC (non-condensing)

Standard Compliance

  • P1386 and P1386.1/Draft 2.0

  • high density multiplexers, multi-service switches, edge routers and digital modems
  • Frame Relay switches and access devices
  • digital access cross-connect systems
  • central office applications
  • PBX and PABX applications
  • gateways
Rev #
Date Last Modified
NPMC-8E1T1J1_datasheet NPMC-8E1/T1 Data Sheet pdf 371 KB 1.0 16-06-2006
NPMC-8E1_manual NPMC-8E1/T1 Technical Reference Manual pdf 389 KB 1.5 12-11-2010

NPMC-8E1/T1/J1 block diagram

Product Code: NPMC-8E1/T1/J1

-8E1/T1 non-intelligent octal E1/T1, SCSA -
-8E1/T1/J1-P non-intelligent octal E1/T1, H.110 (PTMC type 5) -


Rev #
Date Last Modified
NISDN-NET5-RTL ISDN Primary Rate Run-Time License for E1 interfaces, Switch Type ETSI, API (CAPI or FAPI), per target  - -
NISDN-PNAM-RTL ISDN Primary Rate Run-Time License for T1 interfaces, Switch Type NI, 5ESS, DMS-100, API (CAPI or FAPI), per target  - -